BIOS 256 LAB 2 ASSIGNMENT – QUESTION AND ANSWERS

BIOS 256 Lab 2 Part A. Reviewing Your Knowledge (pg. 603-604) A. GENERAL TERMINOLOGY Write the term that matches the description. Large molecules resulting from anabolism. A biological catalyst. The molecule acted on by an enzyme. Process that happens to nutrients after digestion. Enzyme that hydrolyzes lipid. Enzyme that hydrolyzes protein. Enzyme that hydrolyzes starch. The molecule produced as a result of an enzymatic process. B. SUBSTRATES AND PRODUCTS Fill in the blank with the appropriate term. Proteins are hydrolyzed into and absorbed as Lipids are hydrolyzed into and absorbed as and Carbohydrates are hydrolyzed into and absorbed as Carbohydrate digestion begins in the Bile salts prepare lipids for digestion by a process called Lipid digestion begins in the Protein digestion begins in the C. CARBOHYDRATE DIGESTION EXERCISE Fill in the blank with the appropriate term. The reagent used to test for the presence of starch was The reagent used to test for the presence of sugar was The three major food macromolecules digested in our GI tract are Why were there 2 tubes in Lab Activity 1 that had no enzyme added to them? The enzymes that digest carbohydrates work best at a(n) ………… The reason why we chew food (and crumbled the cracker in Lab Activity 1) is A positive test for the presence of sugar is indicated by which colors? A positive test for the presence of starch is indicated by which colors? PART B. USING YOUR KNOWLEDGE (PG. 605) A. Digestion 1–3. Enzymes that digest carbohydrates are produced by what organs? 4–6. Enzymes that digest lipids are produced by what organs? 7–9. Enzymes that digest proteins are produced by what organs? 10. People who practice purging themselves after eating (bulimics) ruin the dentin of their teeth. What causes the dentin loss?